 #define _CRT_SECURE_NO_WARNINGS 1

class Solution {
public:
    int peakIndexInMountainArray(vector<int>& arr) {
        int left = 1, right = arr.size() - 2;

        while (left < right)
        {
            int mid = left + (right - left + 1) / 2;
            if (arr[mid] > arr[mid - 1]) left = mid;
            else right = mid - 1;
        }

        return left;
    }
};

class Solution {
public:
    int findPeakElement(vector<int>& nums) {
        int left = 0, right = nums.size() - 1;

        while (left < right)
        {
            int mid = left + (right - left + 1) / 2;
            if (nums[mid] > nums[mid - 1]) left = mid;
            else right = mid - 1;
        }

        return left;
    }
};

class Solution {
public:
    int findMin(vector<int>& nums) {
        int left = 0, right = nums.size() - 1;
        int x = nums[right];

        while (left < right)
        {
            int mid = left + (right - left) / 2;
            if (nums[mid] > x) left = mid + 1;
            else right = mid; a
        }

        return nums[left];
    }
};